code: def test_check_array_1():
      X = np.array([1, 2, 3])
      est = BlankModel()
      assert_raises(
          ValueError,
          "X must be a 2D array. Try X[:, numpy.newaxis]",
          est._check_arrays,
          X,
      )
  
file_path: mlxtend/mlxtend/_base/tests/test_base_model.py
imports: import numpy
  from mlxtend._base import _BaseModel
  from mlxtend.utils import assert_raises
label_desc: Use image node_id 2 for calling a global function with example usage: test_check_array_1() without return types